Service Manual

Page 24
Axle Assembly
General comments to be applied to the Axle
Assembly Procedures and Recommendations:
1. Clean and dry all surfaces to which sealant or
adhesive will be applied.
2. Clean and dry all threads of capscrews or holes to
which thread locker will be applied.
3. Apply thread locker to capscrew threads in through
holes, and into tapped holes when blind holes.
4. All fastener torques and recommended thread
locker types are located in a table listed in the
“Torque Table” in section 6 in this manual by thread
size and location.
5.
Torquing of all capscrews is to be done in a
crossing pattern for even clamping.
6. Taper bearing cones and cups must be from the
same bearing vendor. Do Not mix cups and cones
in mating assemblies or same axle wheel ends.
7. Needle bearings must be from the same bearing
vendor, if being replaced from disassembly, and
not mixed in re-assembly. Variations in different
bearing vendors can adversely impact needle
bearing life.
8. After pressing a bearing cone/cup into an assembly,
use a 0.025mm (0.001”) feeler gauge to verify
assembly is properly installed against bearing
cone/cup shoulder.
9. Mating surfaces between 2 components must be
free of “positive” indentations (with material above
surface). Minor “negative” indentations are
permitted.
10. Functional critical surfaces must be free from
defects:
Friction faces on the wet brake /Hydraulic differ-
ential lock stationary discs and reaction plates.
P
iston bores of the wet brake and Hydraulic
differential lock components.
Seal races or seat, O-Ring sealing surfaces.
Planet pinion bore, planet pinion shaft.
11. Use of the correct assembly tools are recom-
mended to assure a quality rework on these axle
components. A listing of the recommended
assembly tools is indicated in the “Special Tools”
section and are available upon request. Use of
incorrect assembly tools may cause damage to
component being installed and other components
associated with component being assembled.
12. All friction discs must be pre-soaked for at least
12 hours in axle oil after rotating wheel end prior
to vehicle use.
13. Following the final axle assembly, there are 4 axle
tests that should be performed to help assure a
quality re-assembly. (Information on each of these
tests are located in the assembly section as the
axle group is assembled or in the carrier manual
5.4 for the carrier test if done separately prior axle
re-installation).
a. Carrier Hydraulic Differential Functional and
Leak Test (if HDL differential equipped).
b. Wet Disc Brake Functional and Leak test.
(if equipped).
c. Axle Air Leak Test.
d. Axle Spin Test.
NOTE: Refer to AxleTech manual 5.4 to follow
the dif
ferential carrier assembly recommended
procedures.
AXLETECH
STF SPEC DESCRIPTION APPROVED COMPOUND WHERE USED
Diff. case bearing cup
STF 02-452
Retaining compound, anaerobic Loctite 680 Wheel bearing spacer
Planetary ring gear shim
STF 02-435
Sealant, anaerobic flexible
Loctite 518 Pinion cage shim pack
Dif
f. case bearing cup
STF 02-458 Retaining compound, anaerobic Loctite 635 Wheel bearing spacer
Planetary ring gear shim
Loctite 5699
Input yoke spline
Permatex 82194 HDL inlet port
STF 02-437
Sealant, R
TV non-corrosive Three Bond 1216 Ring gear thrust screw
Three Bond 1216E
Housing, carrier face
Housing, trunnion adapter face
Thread Locker’s, Adhesives, Sealants
AxleTech STF specs for organic materials are called out across the text. Use table below to identify
approved compounds.
Section 4
Assembly